伝送零点を削減した複素係数フィルタの一構成とそのリープフロッグシミュレーション

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2017/12/01

タイトル(英語): Synthesis of a Complex Filter with Reduced Transmission Zeros and Its Leapfrog Simulation

著者名: 藤井　達哉（筑波大学　システム情報工学研究科），庄野　和宏（筑波大学　システム情報工学研究科）

著者名(英語): Tatsuya Fujii (Graduate School of Systems and Information Engineering, University of Tsukuba), Kazuhiro Shouno (Graduate School of Systems and Information Engineering, University of Tsukuba)

キーワード: アナログ，フィルタ，複素，伝送零点，リープフロッグ　　analog，filter，complex，transmission zeros，leapfrog

要約(英語): In this paper, a synthesis of a complex filter with reduced transmission zeros is proposed. A new characteristic function is proposed. It is described that the element values are obtained from the proposed characteristic function. The proposed prototype complex filter has finite transmission zeros at negative frequency area only. The required elements of the proposed prototype complex filters are fewer than that of the conventional ones with finite transmission zeros. Algorithms for determining the element values is described. The resulting circuit can be simulated without bilinear complex coefficient transfer functions. As an example, a third-order filter with equiripple passband response is designed. The image rejection ratio, sensitivity and the number of required elements are compared with those of the complex filters based on the frequency shifting method. The proposed circuit has the best image rejection ratio in the complex filters based on the frequency shifting method. The validity of the proposed method is confirmed through both of computer simulation and experiment. The experimental circuit exhibits complex bandpass characteristics(1-5kHz) and an image rejection ratio of 40.3 dB.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.137 No.12 （2017） 特集Ⅰ：電気・電子・情報関係学会東海支部連合大会　特集Ⅱ：国際会議ICESS2016

本誌掲載ページ: 1649-1658 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/137/12/137_1649/_article/-char/ja/